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Technical plastics,
plastics machining

Seal manufacturing – From starting material to final product

We manufacture seals from many materials. Typically these are flat gaskets made from asbestos-free plates and rubbers, but we can also produce gaskets from graphite, ptfe and other specialised materials.

Thanks to CNC production technology, the production of gaskets is fast and efficient.

FLAT SHADOW

Manufacture of seals

Die-cut gaskets are most commonly made from the materials described below(asbestos-free plates, PTFE-based plates, graphite plates).

However, flat seals and shaped cut-outs can also be made from rubber, engineering plastics, thermal insulation materials, microporous materials, leather and other plate-like materials.

We produce seals by cutting or milling on our own CNC router with a working area of 2 100 x 3 100 mm (more details about our technology), as well as on die-cutting machines and, if necessary, we can also use water jet technology, laser and other methods of shape cutting of material.

Shaped die-cuts and flat seals are used across all areas of industry to seal flanges, valves, PCBs, piping systems, gases, oils, fuels and coolants, for example. Also for thermal insulation applications, sound insulation, as abrasion resistant elements, hopper linings and many other applications.

Thanks to our CNC production technology, we are able to efficiently and quickly handle piece production as well as the processing of large batches.

PRODUCTION OF TISSUE

Flat seals – examples of our products

Pryže-výrobky
Pryže-oscilace
Pryže-řezání
Pryže-nesting
Pryže-oscilační nůž

Below you will find an overview of the parameters of the basic materials we use for the production of flat seals.
However, according to the requirement, the seals can also be made of other, related materials.

Asbestos-free sealing plates

BA202

Composition: NBR, organic fibres
Main properties: good resistance to water, gas, oil and fuel
Typical applications: light duty piping systems

Max. Temperature – short-term: 180 °C
Max. Temperature – long term: 140 °C
Max. Temperature – steam: 120 °C
Max. Operating pressure: 40 bar

Available thicknesses: 0.5; 0.8; 1; 1.5; 2.0; 3.0 mm
Plate size: 1500 x 1000 / 1500 x 1500 mm

BA50

Composition: NBR, aramid fibres
Main properties: sealing material with good dynamic resistance
Typical applications: gas, chemical industry, food industry

Max. Temperature – short-term: 280 °C
Max. temperature – long term: 220 °C
Max. Temperature – steamed: 180 °C
Max. Operating pressure: 80 bar

Available thicknesses: 0.5; 0.8; 1; 1.5; 2.0; 3.0 mm
Plate size: 1500 x 1000 / 1500 x 1500 mm

BA F

Composition: NBR, graphite, synthetic fibres
Main properties: good thermal properties, chemical resistance for steam, oil, gases, fuels, alkaline environments and weak acids
Typical applications: chemical and petrochemical industries

Max. Temperature – short-term: 350 °C
Max. temperature – long term: 250 °C
Max. Temperature – steamed: 200 °C
Max. operating pressure: 100 bar

Available thicknesses: 0.5; 0.8; 1; 1.5; 2.0; 3.0 mm
Plate size: 1500 x 1000 / 1500 x 1500 mm

BA GL

Composition: NBR, fiberglass
Main properties: excellent temperature and steam resistance
Typical applications: suitable for water, oil, gas, fuel organic and inorganic acids

Max. Temperature – short-term: 440 °C
Max. temperature – long term: 350 °C
Max. Temperature – steam: 250 °C
Max. operating pressure: 100 bar

Available thicknesses: 0.5; 0.8; 1; 1.5; 2.0; 3.0 mm
Plate size: 1500 x 1000 / 1500 x 1500 mm

BA U

Composition: NBR, aramid fibres
Main properties: good chemical, mechanical and thermal properties
Typical use: general purpose

Max. Temperature – short-term: 350 °C
Max. temperature – long term: 250 °C
Max. Temperature – steamed: 200 °C
Max. operating pressure: 100 bar

Available thicknesses: 0.5; 0.8; 1; 1.5; 2.0; 3.0 mm
Plate size: 1500 x 1000 / 1500 x 1500 mm

TEMACARB

Composition: NBR, carbon fibre
Main properties: high temperature and pressure in chemical industry
Typical applications: chemical industry, alkaline media, superheated steam

Max. Temperature – short-term: 450 °C
Max. temperature – long term: 250 °C
Max. Temperature – steam: 250 °C
Max. Operating pressure: 140 bar

Available thicknesses: 0.5; 0.8; 1; 1.5; 2.0; 3.0; 4.0 mm
Plate size: 1500 x 1000 / 1500 x 1500 mm

TEMACID

Composition: special blend of rubbers, aramid fibres
Main properties: high chemical resistance,
Typical applications: aggressive chemical environments, oils, fuels and coolants

Max. Temperature – short-term: 200 °C
Max. temperature – long term: 150 °C
Max. Temperature – steam: 150 °C
Max. Operating pressure: 50 bar

Available thicknesses: 0.5; 0.8; 1; 1.5; 2.0; 3.0; 4.0 mm
Plate size: 1500 x 1000 / 1500 x 1500 mm

TEMAFAST

Composition: NBR, organic fibres. Can be made with wire mesh
Main features: versatile material for a wide range of applications
Typical applications: in all industries at lower parameters

Max. Temperature – short-term: 210 °C
Max. Temperature – long term: 140 °C
Max. Temperature – steam: 120 °C
Max. Operating pressure: 40 bar

Available thicknesses: 0.5; 0.8; 1; 1.5; 2.0; 3.0; 4.0 mm
Plate size: 1500 x 1000 / 1500 x 1500 mm

TEMAPLUS

Composition: NBR, aramid fibres. Can be made with wire mesh
Main features: good resistance to oils, fuels, lubricants, alcohols, gases, hydrocarbons and other substances
Typical applications: for a wide range of applications across industry

Max. Temperature – short-term: 450 °C
Max. temperature – long term: 250 °C
Max. Temperature – steamed: 200 °C
Max. Operating pressure: 130 bar

Available thicknesses: 0.5; 0.8; 1; 1.5; 2.0; 3.0; 4.0 mm
Plate size: 1500 x 1000 / 1500 x 1500 mm

TEMASIL

Composition: NBR, temperature-resistant fibres. Can be made with wire mesh
Main features: sealing hot and cold water, oils, gases and basic chemicals
Typical applications: for a wide range of uses across industry

Max. Temperature – short-term: 400 °C
Max. temperature – long term: 250 °C
Max. Temperature – steamed: 200 °C
Max. operating pressure: 100 bar

Available thicknesses: 0.5; 0.8; 1; 1.5; 2.0; 3.0; 4.0 mm
Plate size: 1500 x 1000 / 1500 x 1500 mm

PTFE-based materials

RECHEM S11

Description: RECHEM S11 is a high performance sealing material made of pure biaxially oriented PTFE with quartz filler.
This PTFE material combines a combination of high chemical resistance and excellent sealing ability.

Use: RECHEM S 11 is a flat seal suitable for high temperature range from -200°C to +260°C and aggressive chemicals over the entire pH range (0 – 14).

The RECHEM S 11 sealing material is suitable for general use in standard compression with high acid resistance. Not suitable for hydrofluoric acid, fluorine gases, molten alkali metals and materials used in their production.

Max. provozní teplota [°C]-200 / +260
Hustota [g/cm³]2,2
Pevnost v tahu [MPa]15
Pevnost v krystalech [MPa]15,4
Těsnící činitel (ASME m) [%]10,0
Těsnící činitel (ASME y) [MPa]16,0
T x P max. 24750
Dielektrická pevnost (Kv/mm) 17,7
Stlačitelnost (ASTM) [%] 10,0
Zpětné odpružení (ASTM) [%] 41
Propustnost plynu [ml/min] <0,04
Těsnost [ml/hod] 0,40
Zadržení tlaku DIN 52913/175°C [MPa] 31
Tečení materiálu [%]24
Dostupné tloušťky [mm]: 0,75; 1; 1,5; 2,0; 2,5; 3,0
Rozměr [mm]: 1500 x 1500
Hodnoty odpovídají materiálu o síle 1,5 mm

RECHEM S33

Description: RECHEM S 33 is a high performance sealing material made of pure biaxially oriented PTFE with a distinctive barium sulfate reinforcing core. This PTFE material combines a combination of high chemical resistance and excellent sealing ability.

Use: RECHEM S 33 is a flat gasket suitable for a wide temperature range from -200°C to +260°C and chemicals over the entire pH range (0 – 14).

RECHEM S 33 sealant is suitable for general use at standard compression, for hydrofluoric acid, alkalis, solvents and chlorine. Ideal use is in the pharmaceutical and food industries in areas requiring a clean environment.

Max. provozní teplota [°C]-200 / +260
Hustota [g/cm³]2,9
Pevnost v tahu [MPa]15,8
Pevnost v krystalech [MPa]16,0
Těsnící činitel (ASME m) [%]1,4
Těsnící činitel (ASME y) [MPa]16,0
T x P max. 27300
Dielektrická pevnost (Kv/mm) 11,2
Stlačitelnost (ASTM) [%] 11,7
Zpětné odpružení (ASTM) [%] 46
Propustnost plynu [ml/min] <0,01
Těsnost [ml/hod] 0,40
Zadržení tlaku DIN 52913/175°C [MPa] 31,2
Tečení materiálu [%]17
Dostupné tloušťky [mm]: 0,75; 1; 1,5; 2,0; 2,5; 3,0
Rozměr [mm]: 1500 x 1500
Hodnoty odpovídají materiálu o síle 1,5 mm

RECHEM S50

Description: RECHEM S 50 is a high-performance sealing material made of pure biaxially oriented PTFE containing hollow glass microspheres.

Use: RECHEM S 50 is a flat seal suitable for different compression ratios, high temperature range from -200°Cto +260°C and suitable for brittle or damaged joint surfaces.

RECHEM S 50 is suitable for joints with low pressure requirements and for all sulphuric acid concentrations.

Max. provozní teplota [°C]-200 / +260
Hustota [g/cm³]1,6
Pevnost v tahu [MPa]12,3
Pevnost v krystalech [MPa]13,4
Těsnící činitel (ASME m) [%]1,4
Těsnící činitel (ASME y) [MPa]13,0
T x P max. 13500
Dielektrická pevnost (Kv/mm) 6,0
Stlačitelnost (ASTM) [%] 43
Zpětné odpružení (ASTM) [%] 39
Propustnost plynu [ml/min] <0,02
Těsnost [ml/hod] 0,12
Zadržení tlaku DIN 52913/175°C [MPa] 33
Tečení materiálu [%]20,8
Dostupné tloušťky [mm]: 0,75; 1; 1,5; 2,0; 2,5; 3,0
Rozměr [mm]: 1500 x 1500
Hodnoty odpovídají materiálu o síle 1,5 mm

Graphite plates

Grafitové těsnění

GRAFILIT

Reinforced graphite sealing plate with stainless steel plate insert.
Usage:

  • As a flat seal for pumps and valves, especially for tiny sealing thicknesses.
  • For gas farms and off-shore technology.
  • For flat seals according to DIN2690 for flanges with smooth sealing strip, for low operating pressures up to 25 bar and medium specific pressures σBO up to 60 N/mm2. If the seals are subjected to low temperatures during operation, the σBO may be higher.
  • For corrosive media, but limited by the stainless steel foil and adhesive layer.

Features:

  • With insert of spiked stainless steel plate, very easy to handle.
  • Soft, pliable.
  • Slight permeability to gases and liquids, even at low specific pressures.
  • Applicable from the lowest temperatures up to over 550 °C depending on operating and installation conditions:
    • in inert environment up to approx. 500 °C
    • in steam tested up to approx. 550 °C
    • in air and oxidizing media from approx. 400 °C – contact us for more information
  • Good resistance to chemicals
  • Asbestos-free, health-safe
  • Resistant to aging and embrittlement, free of binders
  • Long-term stable compressibility and cushioning in wide temperature range.
  • At the recommended specific pressures, there are no measurable cold or heat flows.
  • Thin adhesive layer ≤ 10 μm, chloride-poor.

SIGRAFLEX ECONOMY

Reinforced graphite sealing plate with stainless steel plate insert.
Usage:

  • As a flat seal for pumps and valves, especially for tiny sealing thicknesses.
  • For gas farms and off-shore technology.
  • For flat seals according to DIN2690 for flanges with smooth sealing strip, for low operating pressures up to 25 bar and medium specific pressures σBO up to 60 N/mm2. If the seals are subjected to low temperatures during operation, the σBO may be higher.
  • For corrosive media, but limited by the stainless steel foil and adhesive layer.

Features:

  • With stainless steel tipped plate insert, very easy to handle.
  • Soft, pliable.
  • Slight permeability to gases and liquids, even at low specific pressures.
  • Applicable from the lowest temperatures up to over 500 °C depending on operating and installation conditions:
    • in an inert environment up to approx. 500 °C
    • Steam tested up to approx. 550 °C
    • in air and oxidizing media from approx. 400 °C – contact us for more information
  • Good resistance to chemicals
  • Asbestos-free, health-safe
  • Resistant to aging and embrittlement, free of binders
  • Long-term stable compressibility and cushioning over a wide temperature range.
  • No measurable cold or hot flows occur at the recommended specific pressures
  • Thin adhesive layer ≤ 10 μm, chloride-poor.

SIGRAFLEX STANDARD

Sealing plate made of impregnated graphite.
Usage:

  • As a flat seal according to DIN 2690 for flanges with smooth sealing strips. Recommended up to DN350
  • For large segment seals from DN 1000. Also for ring shaft sleeves.
  • For medium operating pressures up to 40 bar and for higher specific pressures up to 100 N/mm2
  • For enamels and glass, especially for portholes.
  • For highly corrosive media such as HCI, it has excellent chemical resistance.
  • For emergency repairs and complicated shapes.

Features:

  • Not susceptible to scratches
  • Low permeability to gases and liquids
  • Applicable from the lowest temperatures up to approx. 500 oC depending on the required service life, installation and operating conditions.
    • in an inert environment up to approx. 3000 oC
    • steamed up to approx. 500 oC
    • in air from approx. 400 oC consultation required
  • Excellent resistance to chemicals
  • Asbestos-free, health-safe
  • Resistant to aging and embrittlement, free of binders
  • Long-term stable compression and cushioning over a wide temperature range.
  • No measurable heat fluxes occur at the recommended specific pressure values
  • Very good resistance to temperature changes
  • Good pressure resistance
  • Easily processed by cutting and pressing
  • Can compensate for larger unevenness of sealing surfaces

SIGRAFLEX UNIVERSAL

Sealing plate made of impregnated graphite. Fire safe test to BS 6755
Application:

  • As a flat seal according to DIN 2690 for flanges with smooth sealing strips. It is recommended as a one-piece. Over DN900 double layer in segments.
  • Preferably for flanges with tongue and groove according to DIN 2691. Up to DN 900 a one-piece arrangement is recommended, from DN 1000 onwards a two-layer segmented arrangement.
  • For high operating pressures up to 100 bar and for high specific pressures up to 140 N/mm2
  • For blowout-proof, securely sealing and highly stressed sealing joints, in stainless steel inner lining.
  • For piping with corrosive media at high temperatures. Heat transfer oil media and thermal equipment. For old equipment, tanks and steam pipes. For exhaust manifolds.
  • Very good chemical resistance therefore for corrosive media. Restriction by stainless steel plate insert.

Certificates and attestations:

  • Fire safe test to BS 6755

Main features:

  • With stainless steel tipped plate insert, very easy to handle.
  • Low gas permeability, impermeable to liquids.
  • Low diffusion quantity, high security against blowing out and high mechanical strength when sealed with stainless steel inner lining.
  • Not susceptible to scratches, slight adhesion to other materials.
  • Applicable from the lowest temperatures up to 500°C depending on operating and installation conditions:
  • in an inert environment up to approx. 800°C (limitation depending on the type of metal insert)
  • steamed up to approx. 500°C
  • in air from approx. 400°C – contact us for more information
  • Good resistance to chemicals
  • Good strength against transverse shear
  • Asbestos-free, health-safe
  • Resistant to aging and embrittlement, free of binders
  • Long-term stable compressibility and cushioning over a wide temperature range.
  • No measurable cold or hot flows occur at the recommended specific pressures
  • Good temperature behaviour
ISO 9001
Our quality guarantee

Our company has obtained the EN ISO 9001:2016 certificate . Not only in the production of flat seals and the handling of these materials, we follow the principles of this certification
and thanks to this we can bring our customers a level of products and services that meets the most stringent quality requirements.

CONTACT

Are you interested in our offer?

If you have any requirement for the production of seals, we will be happy to be contacted. We will be happy to discuss everything with you and prepare a non-binding quotation based on the documents.

If you are interested, please contact us on one of the contacts listed here or via the contact form.